import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebServlet("/state")
public class StateServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
            IOException {
        int state=Integer.valueOf(req.getParameter("state"));
        if(state>0){
          resp.setStatus(state);
        }else{
            resp.setContentType("text/html;charset=utf-8");
            resp.getWriter().println("<h2>无效参数</h2>");
        }
    }
}
